Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dccb6e5209db663…

MALICIOUS

PDF

94.8 KB Created: 2021-06-27 21:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9aceaef7f67c4cb73c69d5e366c9c703 SHA-1: 5b335f6e262ff6c71235b17acb8cf70fa7cd5a87 SHA-256: 1dccb6e5209db663b269c475c107c65bd8e426e54673e8e59227b3125355ce56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URLs, many hosted on compromised CMS uploads or disposable domains. These URLs form a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=guided+imagery+for+sleep+script PDF link annotation
    • https://solo-enoant.com/content/files/files/28593412798.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/22842073030.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7d3f0c6f---24869975245.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/libetuluxezulejiwaxan.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/pazexawekepepajapefusena.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/93390002539.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b314a8d22---79954533134.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871ecbd272e---26097657494.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/riwivaratesuwubigo.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/074ab918e45e2b0c532beb0273cb8a92/rupagu.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/piduxapitejedebem.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qg8b7nnfvrt5nn7ngsb2569734/14042554927.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/58nctemnndrekl3qa6l4p4d5a6/jowanagopovedalaxu.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/80233537381.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcd075d1e5---35195109006.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/30292786830.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/59b7c4ee1d04646440b1490d75449970/1649137121.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/vagorezuxevepanelimonogod.pdfIn PDF document text
    • http://yuhongzg.com/d/files/numepaliwizogifazawiret.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c9918cf476b1478b4b3711d64541ba07/15684358463.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/726caf341a7370c66d4ba040a6e2451f/42037615391.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/n828qren052mu6hvdcse4o56g4/70785957731.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/16368083697.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/61724011410.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 16760 bytes
SHA-256: 6926f3c2711c71b197b459b9b36ae49315d87cb1b935ea8b293792f5c8357b26
font_02_sfnt_off00015280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15280 11112 bytes
SHA-256: 6149dce02d3b4fbf3fbe2c51a6d41b05041574fe97c49d7c9d2cefe9bf502329

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